I would like to see the ability to filter my route planning by not only country but also state. For instance at the minute in north america challenge I am looking to operate within specific areas and if I could do this by state instead of by distance and searching it would save a lot of time.

I would like to see the ability to filter my route planning by not only country but also state. For instance at the minute in north america challenge I am looking to operate within specific areas and if I could do this by state instead of by distance and searching it would save a lot of time.

Who's going to go through all 2500+ airports to work out which state/county/province/oblast/department each one is in?

If you want to put an artificial restriction on which airports you fly to, easier to just work it out yourself.

I will say it would be useful to have a "directional" search for flying the direction you want. So if you're flying red eyes and want to go east or west, you can just pull the airports that lie in that direction. Since we have lon/lat data for every airport, this would just be pretty simple. Right now all we can pull are timezone and concentric circles.

State data of each airport is not stored in airports database so it would require manual/semi-manual work for the US airports which is too big of a task compared to the gains here...

Actually, the gains for the players can be quite significant. For example, intra-Texas flights have far more demand than do interstate flights, but finding those airports can be somewhat of a challenge.